Question

If readings of spring balances $S_1,S_2,S_3$ and $S_4$ are a kg, b kg, c kg respectively, then choose the correct option.

• A. a < b < c < d
• B. b < c < d
• C. c= a < b < d
• D. d= a

Answer 1

Answer: (C)

c= a < b < d

Reading in the spring balance is the mass attached on both sides of the balance to stretch under the action of gravitation.

Thus reading in balance $S_1$ is $a=2kg$

Reading in balance $S_2$ is $b=2kg+1kg$(Weight of spring $S_3$)

$=3kg$

Reading in balance $S_3=c=2kg$

Reading in balance $S_4=2kg+1kg+3kg-2kg=4kg=d$

Thus $c=a<b<d$